Arnold Leff, MD
NPI 1326004730 · Family Medicine Physician · San Jose, CA
Arnold Leff, MD is a Family Medicine Physician provider in San Jose, CA (NPI 1326004730).
Provider details
- NPI number
- 1326004730
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C31564 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-25
- Last updated
- 2018-05-07
Frequently asked questions
- What is Arnold Leff's NPI number?
- Arnold Leff's National Provider Identifier (NPI) is 1326004730, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arnold Leff's specialty?
- Arnold Leff is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Arnold Leff located?
- Arnold Leff's practice location on file with NPPES is 2400 Moorpark Ave, San Jose, CA 95128-2625.
- What is Arnold Leff's phone number?
- The practice phone number listed in the NPPES registry for Arnold Leff is (408) 885-5000.
- Is Arnold Leff's NPI active?
- Yes — Arnold Leff's NPI (1326004730) is active in the NPPES registry as of the last update on 2018-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.